Well-drilling derrick



April 10, 1928.

D. D. W-ERTZBERGER WELL DRILLING DERRICK Filed July 19. 1924 5 Sheets-Sheet l April 10, 1928. 1,665,488

D. D. WERTZBERGER WELL DRILLING DERRICK Filed July 19. .1924 5 sheets-sheet 2 D. D. WERTZBERGER WELL DRILLING DERRICK "April' 10, 1928. 1,665,488

Filed July'19. 1924 5 Sheets-Sheet 4 April 10, 1928.

Filed July 19. 1924 D. D. WERTZBERGER 5 Sheets-Sheet 5 VE IE3 Q 294%!45'77452 3 17 6/.

Patented Apr. 10, 1928.

DALLAS D. WER'IZBERGER, 0F TULSA, OKLAHOMA.

WELL-DRILLING DERRICK.

Application filed-July 19, 1924. ySerial No. 727,033.

This invention relates to well drilling derricks, with particular reference to the type known as a cable drilling rig.

Owing to the commonly inaccessible locations of such rigs, and the ditficulty of erection, such derricks are commonlyconstructed of wood with bracing applied thereto in an endeavor to neutralize the vibration of the structure under the heavy loading and impact stresses it is subjected to in drilling service. The varying and intermittent nature of the loading tends to loosen up all the fastenings and it is not an uncommon happening for parts of the derrick to work loose and drop impairing the structure and exposing the workers to possible injury. It is accordingly an object of this invention to provide improved bracing means for a derrick so constructed that the parts will be held against working loose.

It is a further object of this invention-to and the sills of-the derrick whereby the alignment of the derrick may be-restored after settlement by jacking up the sill timhers under the propercorners and blocking or we'dging the'legs, thus eliminating the labor and danger of digging a space under the legs themselves to permit placinga jack thereunder.

It is also an object of this invention to provide diagonal bracing comprising rods having right and left hand threaded ends screwing into nuts held in brackets,the intersecting points of each pair of diagonal braces'being clamped together to "eliminate individual vibrations that might tend to unscrew the rods.

It is another object of this invention to provide an improved derrick top ordeadwood adapted to rigidly support the'cable sheave.

Other and further important objects of this invention will be apparent from the disclosures in the specification and the accompanying drawings.

This invention (in a preferred form) is illustrated in the drawings and hereinafter more fully described.

On the drawings Figure 1 is a front elevation of the walking beam side of a complete derrick with some details omitted because of the necessarily small scale of the drawing.

Figure 2 is a side elevation of the lower part of the derrick.

Figure 3 is-an enlarged fragmentary elevat on of half the panel through which the walking beam projects.

Figure 4 is a fragmentary plan of the derrick top.

Figure 5 is a perspective drawingof the joint between the legs and sill timbers.

F gure 6 is anenlarged section on the line 6-6 of Figure 3.

Figure 7 is'an enlarged section on the line 77 of Figure3.

Figure 8 is-an enlarged fragmentary elevationof the top panel joint shown in Figure 3.

Figure 9 is 'an enlarged partial section on the'line 9-9 of Figure 1.

Figure'lO is an enlarged elevation of the tie rod bracket at the center of the strut for the walking beam aperture.

Figure 11 is an enlarged fragmentaryelevation of the bottom tie rod leg bracket of provide an improved joint between the'legs Figure 3.

Figure12 isa section on the line 12-12 of Figure 11.

Figure 13 is an'enlarged fragmentary elevation of the lower bracket shown in Figure 8.

Figure 17 is a section on the line 17-17 ofFigure 1.

Figure 18 is a fragmentary plan view of a corner of the derrick top with parts broken away. I

Figure 19 is an enlarged section on'the line '1 919 of Figure 1.

Figure 20 is an'enlarged section on the line-202O of Figure 19.

Figure 21 is a fragmentary elevation showing the top bracket.

Figure 22 is a section on the line 2222 of Figure 21.

Figure 23 is a section of a modified form of tie rod nut.

As shown on the drawings The derrickin general comprises four upstanding standards or legs 25 which converge toward the top to form a platform 26, commonly called the deadwood, to support the drilling cable sheave and the sand line sheave if one is used. The lower ends of the legs 25 are rabbeted as at 27 in Figure hole, and if sucha displacement occurs the sills may be jacked up to permit rearrangement of the usual blocking under one or more of, the derrick legs. The joints between the legs and sills are further reinforced by diagonal struts 29 from each leg to eachsill. a A plurality of cross members 30 serve to tie the legs together at different heights to eliminate 'buckling of the legs under the load. These cross members. serve to divide the derrick into panels, which are diagonally braced each way by rods 31 having right and left threaded ends engaging 1n nuts 32 held in anchoring bracktes which are proa two cross members vided with lugs 34 adapted to contact one face of the-nuts to prevent movement thereof. FigureS shows a typical bracket arranged to be bolted over the joint between 30 and having provision for four bracing rods in two planes. Be cause of the greater width between the in the lower half of the derrick the cross members are preferably reinforced by a bolted in timber. 35 abutting against the F legs 20.

brackets 1-1 of Fi V Figure filler timbers and thence other rods In the panel next above the ground or. working platform 36 provision is made for the end of the walking beam by providing a pair of vertical struts 37 connecting intermediate cross-members 38 and inserting short filler timbers 39 to take the compressive strain of short tie rods 40 arranged to. brace the. panel without obstructing the opening between the struts 37. Anchoring gure 1O areused on the struts adjacentthe filler timbers 39, the upper rods fromthis bracket leading to brackets 42 shown in Figures 8 and 13; and the lower rods leading to brackets 4:3 shown in 11. From these brackets 43 rods lead to brackets located on the legends of the lead to the plane surface; and a the regular panel brackets 33 at the top of this special panel. Wherever two rods 31 cross or intersect a U clamp 44 is used to dampen vibration and prevent loosening of the rods in service.

The nuts 32 used with the rods 31 are preferably provided with a cylindricalsection 45 adapted to pass through the apertures in the bracket and thereby prevent damage to the threads of: the rods from contact with the apertures under the existing conditions of severe vibration which would quicklybatter the threads to such an. extent as to prevent subsequent tightening of the rods if necessitated byfthe shrinkage of the Wooden mem bers of the derrick .upon exposure. In the modification of Figure23 the nut and bushmg 45 not held from rotation by lugs on bracket but clamped by a locking nut on the rod.

The structure of the derrick top or dead wood 26 illustrated in Figures 18 to 20.

The tops of the legs 25 are cut oif to form a bolted framing 46 is secured thereto.v The deadwoods 47 proper are boltedto two of the side members of this framing to 'form a sheave bearing supports. The rods bracing terminates in brackets d8 shown in Figure 21 which; are applied to the corners hold it in place on the legs 25. i

I am aware that many changes may be made, and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I therefore do not purpose limiting the patent granted hereon, otherwise than necessitated by the prior art. l

I claim as my invention:

Diagonal bracing for derrick legs comprismg anchoring brackets secured to said legs and having apertures nuts having integral bushings formed thereon and extending through said'apertures, diagonal rodshaving In testimony whereofl have hereunto subscribedby name.

DALLAS D. WERTZBERGER.

oi the framing 46'to 

